STIGQter: STIG Summary: Microsoft Exchange 2019 Edge Server Security Technical Implementation Guide Version: 2 Release: 2 Benchmark Date: 30 Jan 2025:

Exchange internet-facing receive connectors must offer Transport Layer Security (TLS) before using basic authentication.

DISA Rule

SV-259595r1043178_rule

Vulnerability Number

V-259595

Group Title

SRG-APP-000219

Rule Version

EX19-ED-000099

Severity

CAT II

CCI(s)

• CCI-001184 - Protect the authenticity of communications sessions.

Weight

10

Fix Recommendation

Open the Exchange Management Shell and enter the following command:

Set-ReceiveConnector -Identity <'IdentityName'> -AuthMechanism 'Tls, BasicAuth, BasicAuthRequireTLS'

Note: The <IdentityName> value must be in quotes.

Example only for the Identity: <ServerName>\Frontend <ServerName>

Repeat the procedure for each receive connector.

Check Contents

Note: This is not applicable for SIPR enclaves.

Open the Exchange Management Shell and enter the following command:

Get-ReceiveConnector | Select-Object -Property Name, Identity, AuthMechanism

For each receive connector, if the value of "AuthMechanism" is not set to "Tls, BasicAuth, BasicAuthRequireTLS", this is a finding.

Vulnerability Number

V-259595

Documentable

False

Rule Version

EX19-ED-000099

Severity Override Guidance

Note: This is not applicable for SIPR enclaves.

Open the Exchange Management Shell and enter the following command:

Get-ReceiveConnector | Select-Object -Property Name, Identity, AuthMechanism

For each receive connector, if the value of "AuthMechanism" is not set to "Tls, BasicAuth, BasicAuthRequireTLS", this is a finding.

Check Content Reference

M

Target Key

5579